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United States Patent | 5,772,727 |
De Haas ,   et al. | June 30, 1998 |
A process of producing metal from a metal ore containing metal oxides includes the steps of: obtaining a reducing gas containing at least one of carbon and hydrogen from solid substances containing at least one of carbon and hydrocarbons; bringing the ore into reaction contact with the reducing gas in a metallurgical blast furnace; and injecting a comminuted, fluidized plastics material into a blast current in a hearth region of the blast furnace, the plastics material comprising an agglomerate including plastics particles having a particle size substantially between 1 mm and 10 mm.
Inventors: | De Haas; Hans (Lilienthal, DE); Janz; Joachim (Oyten, DE); Mohnkern; Horstmar (Ritterhude, DE); Voss; Manfred (Bremen, DE) |
Assignee: | Stahlwerke Bremen GmbH (Bremen, DE) |
Appl. No.: | 507247 |
Filed: | August 18, 1995 |
PCT Filed: | December 17, 1994 |
PCT NO: | PCT/EP94/01203 |
371 Date: | August 18, 1995 |
102(e) Date: | August 18, 1995 |
PCT PUB.NO.: | WO95/17527 |
PCT PUB. Date: | June 29, 1995 |
Dec 21, 1993[DE] | 43 43 768.0 | |
Apr 25, 1994[DE] | 941 06 439.6 |
Current U.S. Class: | 75/378; 75/414; 75/460 |
Intern'l Class: | C21B 005/02 |
Field of Search: | 75/460,461,462,463,464,471,499,500,501,502,378,414 |
3876421 | Apr., 1975 | Takemura | 75/533. |
3955966 | May., 1976 | Meichsner | 75/532. |
3998606 | Dec., 1976 | Miyashita et al. | |
5244490 | Sep., 1993 | Agarwal | 75/500. |
5554207 | Sep., 1996 | Bogdan et al. | 75/500. |
Foreign Patent Documents | |||
2168596 | Aug., 1973 | FR. | |
29 35 544 | Mar., 1981 | DE. | |
41 04 252 | Aug., 1992 | DE. | |
2 185 970 | Aug., 1987 | GB. |